FranTk is a library for building GUIs in Haskell. FranTk uses behaviours and events, concepts from Conal Elliott’s Functional Reactive Animation. FranTk provides good support for developing complex dynamic systems, and is built on top of Tcl/Tk. This makes it platform independent. FranTk was developed by [http://www.dcs.gla.ac.uk/~meurig/ Meurig Sage]. It runs on Unix and Windows.

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FranTk is a library (that seems to have disappeared from Internet) for building GUIs in Haskell. FranTk uses behaviours and events, concepts from Conal Elliott’s Functional Reactive Animation. FranTk provides good support for developing complex dynamic systems, and is built on top of Tcl/Tk. This makes it platform independent. FranTk was developed by [http://www.dcs.gla.ac.uk/~meurig/ Meurig Sage]. It runs on Unix and Windows.

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See the [http://haskell.org/FranTk FranTk homepage].

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A short description can be found at the

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[http://src.gnu-darwin.org/ports/x11-toolkits/hs-frantk/work/FranTk1.1/FranTk.html GNU-Darwin site]. For more information, see the PDF document [http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.25.8446&rep=rep1&type=pdf FranTk – A declarative GUI language for Haskell].

=== Fruit ===

=== Fruit ===

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[[wxFruit]] is a GUI library based on the ideas of Fruit but built on top of wxHaskell.

[[wxFruit]] is a GUI library based on the ideas of Fruit but built on top of wxHaskell.

See the [http://hackage.haskell.org/cgi-bin/hackage-scripts/package/vty Hackage page].

See the [http://hackage.haskell.org/cgi-bin/hackage-scripts/package/vty Hackage page].

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=== vty-ui ===

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[http://jtdaugherty.github.com/vty-ui/ vty-ui] is a

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high-level user interface library for applications running in terminal emulators. It provides similar functionality to what you might expect from graphical toolkits like GTK and QT. vty-ui is written in the Haskell programming language.

== Unsupported ==

== Unsupported ==

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This page contains a list of libraries and tools in a certain category. For a comprehensive list of such pages, see Applications and libraries.

There is a large number of GUI libraries for Haskell. Unfortunately there is no standard one and all are more or less incomplete. In general, low-level veneers are going well, but they are low level. High-level abstractions are pretty experimental. There is a need for a supported medium-level GUI library.

1.1 FG

1.2 FranTk

FranTk is a library (that seems to have disappeared from Internet) for building GUIs in Haskell. FranTk uses behaviours and events, concepts from Conal Elliott’s Functional Reactive Animation. FranTk provides good support for developing complex dynamic systems, and is built on top of Tcl/Tk. This makes it platform independent. FranTk was developed by Meurig Sage. It runs on Unix and Windows.

1.3 Fruit

Fruit is another high-level approach to GUIs in Haskell. It is based on the concepts of Functional Reactive Programming and arrows. There is also another implementation of this approach, called wxFruit (see below).

1.4 Fudgets

Fudgets is primarily a Graphical User Interface Toolkit for Haskell and the X Windows system. Fudgets also makes it easy to create client-server applications that communicate via the Internet. It runs on Unix but not on Windows.

1.5 Grapefruit

Grapefruit is an arrow-based declarative library. Widgets, windows and control components communicate via discrete and continuous signals. The use of signals is explicit in the interface to avoid certain inefficiencies. Internally, Grapefruit uses the event handling mechanisms of the underlying GUI toolkit.

Currently, Grapefruit is build on top of Gtk2Hs but implementations based on other toolkits are planned for the future.

2 Data Binding

3 Medium-level

3.1 Functional Forms

An addition to wxHaskell, Functional Forms is a combinator library/domain specific language which enables a very concise programming style for forms: dialogs which only show and edit a set of values. Forms are used in many applications as Options or Settings dialogs.

3.2 Gtk2Hs

Gtk2Hs is a GUI library for Haskell based on Gtk+. Gtk+ is an extensive and mature multi-platform toolkit for creating graphical user interfaces. Gtk2Hs is actively developed, supporting the latest version of the Gtk+ 2.x series. It provides automatic memory management, Unicode support and also bindings for various Gnome modules. It runs on Windows, Linux, MacOS X, FreeBSD and Solaris.

3.3 HGL

3.4 HQK

HQK is an effort to provide Haskell bindings to large parts of the Qt and KDE libraries. The goal is to auto-generate most of the binding code from C++ header files. We plan to develop a HQK GUI backend for the Functional Reactive Programming library Grapefruit, thereby making Grapefruit multi-platform.

3.5 HTk

Htk is a typed, portable encapsulation of Tcl/Tk into Haskell. Its distinctive features are the use of Haskell types and type classes for structuring the interface, an abstract notion of event for describing user interaction, and portability across Windows, Unix and Linux.

3.6 HToolkit

HToolkit is a portable Haskell library for writing graphical user interfaces (GUI's). The library is built upon a low-level interface that will be implemented for each different target platform. The low-level library is called Port and is currently implemented for GTK and Windows. The middle-level library is named GIO (the Graphical IO library) and is built upon the low-level Port library.

3.7 Object I/O for Haskell

3.8 qtHaskell

qtHaskell is a set of bindings for the Qt Widget library from Trolltech. Haskell
programmers can now access the Qt "signals and slots" based interface methodolgy
(no Qt precompilation necessary), runtime loading of xml based interfaces
designed with Qt Designer, ECMA/Javascript based apps (signal/slot calls can be passed through from javascript to Haskell and vice/versa) and so on.

3.9 wxHaskell

wxHaskell is a portable and native GUI library built on top of wxWidgets (formerly wxWindows)—a comprehensive C++ library that is portable across all major GUI platforms; including GTK, Windows, X11, and MacOS X. wxWidgets is a mature library (in development since 1992) that supports a wide range of widgets with the native look-and-feel, and it has a very active community.

4 Low-level

4.1 GLFW

4.2 GLUT

This is a binding to the OpenGL GLUT library.

4.3 TclHaskell

TclHaskell is a library of functions for writing platform independent, graphical user interfaces in Haskell. The library provides a convenient, abstract and high-level way to write window-oriented applications. It also provides a more low level interface to write primitive Tcl code where helpful. For Unix and Windows and maybe Macintosh.

5.2 hscurses

This is a Haskell binding to the NCurses library, a library of functions that manage an application’s display on character-cell terminals. hscurses also provides some basic widgets implemented on top of the ncurses binding, such as a text input widget and a table widget.

5.3 vty

5.4 vty-ui

vty-ui is a
high-level user interface library for applications running in terminal emulators. It provides similar functionality to what you might expect from graphical toolkits like GTK and QT. vty-ui is written in the Haskell programming language.

6 Unsupported

The following libraries seem to be no longer maintained. However, someone might pick up one of them or at least profit from some design ideas.

6.1 AutoForms

AutoForms is a library to ease the creation of Graphical User Interfaces (GUI). It does this by using generic programming to construct GUI components.

6.2 Budgets

Budgets is a library of Fudget-like combinators based on the Openlook widget library was developed by Alastair Reid and Satnam Singh. The code has suffered tremendous bit-rot (Does anyone have a copy of ghc-0.16?) but all the reusable ideas are described in the respective paper.

6.3 Embracing Windows

This is a framework for developing graphical user interfaces. It runs under Windows 95 using a modified version of Hugs 1.3.

6.4 Gadgets

Gadgets are lazy functional components for graphical user interfaces, developed by Rob Noble under the supervision of Colin Runciman.

See LNCS 982, pages 321-340.

6.5 Gtk+HS

Gtk+HS is a Haskell binding for GTK+. It provides a transcription of the original GTK+ API into Haskell. GTK+ is a modern, portable GUI library and forms the basis of the Gnome desktop project. The binding, while not complete, covers most of GTK+'s core functionality and is ready for use in applications that require a GUI of medium complexity. It was developed under Unix, but should also be usable with the Windows port of GTK+.

6.6 Haggis

Haggis is a graphical user interface framework for Haskell, running under the X Window system. It is being developed using the Glasgow Haskell Compiler with its concurrent extensions to achieve more comfortable interaction with the outside world.